Nut-lock



(No Model.)

J. 11. BURDICK.

NUT LOCK.

No. 377,188. Patented Jan. 81, 1888.

Unirse STATES PATENT rricn.

JUSTIN H. BUItDICK, OF UTICA, ASSIGNOR TO THE ELASTIO NUT COMPANY, OF MILWAUKEE, VISOONSIN.

NUTLOC K..

SPECIFICATION forming part of Letters Patent No. 377,188, dated January 31, 1888.

Application filed June 10, 1587.

To @ZZ whom, it may concern:

Be it known that I, JUsTIN H. BURDICK, of Utica, in the county of Dane, and in the State of Wisconsin, have invented certain new and 5 useful Improvements in Nuts, and I do hereby declare that the following is a full, clear, and exact description thereof.

Myinvention relates to devices for securing nuts iirnily upon the screwthreaded portions ro of bolts, and will be fully described hereinafter,

and pointed out in the claim.

In the drawings, Figure l is aview of the end of a bolt, with the nut shown in section in place thereon. Fig. 2 is a View of one of the i5 nuts detached, and Fig. 3 is an end view of the nut and bolt together.

A represents the bolt, and B the nut, the latter being niade of elastic material-such as steel-and slitted and analogous to that shown zo in my Patent No. 356,744, granted February 1,

1887, save that the bore is not flattened nor rendered elliptical, as in said patent; but instead thereof the pitch of the nut-threadsis made dit"- ierent from the pitch ofthe bolt-threads. For

25 illustration, let the pitch of the boltthreads be ten to the inch and the pitch of the nutthreads be ten and one-eighth to the inch. Now, inasmuch as it would be impossible for a rigid nut with this variation of pitch to be screwed to place on the bolt, my nut, to ac- 3o complish this,will open at the slit a, and may then be readily screwed to place, the coarser threads on the bolt preventing Contact the depth of the threads; but the irnpingeinent between the bolt and nut being exceedingly 35 tight and iirin at the beginning and end of the thread of the nut, all jar and vibration to which the nut and bolt are subjected tend only toward a closer approach of the separated threads and irmer impingement of those in 4o contact.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The combination of a screwthreaded bolt 5,5 with a slitted elastic nut, the bore of the bolt and nut being normally the same, but the pitch of the threads being diii'erent.

In testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in 5o the county of Milwaukee and State of Visconsin, in the presence of two witnesses.

JUSTIN H. BURDICK.

Witnesses:

H. G. UNDnRWooD, MAURICE F. FREAR. 

